Patents by Inventor Michael Elfferding

Michael Elfferding has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cyclopentadienylphosphazene complexes (CpPN Complexes) of metals of the third and fourth group and of the lanthanoids
    Publication number: 20110034715
    Abstract: The present invention concerns cyclopentadienylphosphazene complexes (CpPN complexes) of the metals of the third and fourth group and of the lanthanoids with the exception of lutetium. The complexes according to the present invention are isolobal and isoelectronic to [(CpSiN)TiR2] complexes. Exactly one CpPN unit is present in the complexes according to the present invention. In all complexes according to the present invention, the cyclopentadienyl unit of CpPN represents a monodentate, anionic ligand of the metal atom. Furthermore, the metal atom is bound to further anionic ligands. In a preferred embodiment, both the cyclopentadienyl unit and the nitrogen atom are bound within CpPN to the metal atom, so that CpPN then represents a bidentate ligand. Complexes according to the present invention, in which CpN represents a bidentate ligand, are CpPN-constrained geometry complexes (CpPN-CGC). Furthermore, methods are provided for the in situ production of the complexes according to the present invention.
    Type: Application
    Filed: November 25, 2008
    Publication date: February 10, 2011
    Inventors: Jörg Sundermeyer, Konstantin Rufanov, Alexander Petrov, Michael Elfferding, Manuel Winkenstette